Bogie or truck for tramway-cars, railway-carriages, or the like.



No. 732,882. PATENTED JULY 7, 1903.

- A. s. NELSON, A. STEWART 817T. J. POSTER. BOGIE 0R TRUCK FORTRAMWAYGARS, RAILWAY GARRIAGES, OR

THE LIKE. APPLICATION FILED man. 13. 1902.

H0 MODEL.

rm: mars Pwem co. mowumq. wnmua'rou, 04 c.

. ANDREW s. NELSON,

UNITED STATES Patented July '7, 1903.

EFICE.

ATENT BOGIE OR TRUCK FOR TRAMWAY-CARS, RAILWAY-CARRIAGES, OR THE LIKE.

SPECIFICATION forming part of Letters Patent No. 732,882, dated July 7,1903. Application filed December 18, 1902. Serial No. 135,132. (Nomodel.)

To all whom it may oonoern:

Be it known that we, ANDREW SoLANDERs NELSON, ALBERT STEWART, and THOMASJOHNSON FOSTER, subjects of the King of the United Kingdom ofGreat-Britain and Ireland, all residing at the Glasgow Rolling Stock andPlant Works, Motherwell, in the county of Lanark, Scotland, haveinvented certain new and useful Improvements in B- gies or Trucks forTramway-Oars, Railway- Oarriages, or the Like, (for which applicationfor patent has been made in Great Britain, No.25,550, dated December14., 1901,) of which the following is a specification.

This invention relates to brakes for bogies 01' trucks having fourwheels, but especially for the type known as maximum tractiontruck; andthe invention has for its object 4o may be desired. For the purpose ofadj netto provide means for adjusting the brake to take up wear and fordistribution of pressure upon the Wheels.

In the accompanying drawings, which illustrate the invention, Figure 1is a side elevation, and Fig. 2 a plan, of part of a truck fitted withthe improved braking'devioe.

As shown in the drawings, the usual brakelevers O are suspended at thepivots Z from the side bars of the truck. The brake-levers O carry theusual cast-ironbrake-blocks M, acting on all the wheels of the bogie,the blocks being preferably-made with the Wearing parts separate andeasily detachable. The brake-blocks are further supported to the pivotsZ by means of hangers Y. Secured to the brake-levers O areconnecting-rods P, to which is secured in turn lever R.

The brake-levers O or the rods P are provided with means of adjustment,such as the nuts 19', at both ends or at one end only, as

ing the brake-blocks to take up wear the end of the application-lever Ris fitted between flan es 0 on an ad 'ustin -nut on the rod P a J a 2the applicationso that on turning the nuts the rod]? maybe traversed tobring the blocks more or less near the wheels. ,While the blocks areapplied simultaneously to all the wheels W, the application-levers arearranged so that any desired proportion of the brake-power may beapplied to any pair of wheels and the balance to the others. Thisadjustment is efieoted by providing a spring Q around the rod P betweenthe lever O and an adjusting-nut p on the rod, which may compress thespring, so that when the brakes are applied by means of the brake-leverRthe brake-block may be fully applied to the largerwheels, while thespringyieldinglessens the pressure of the brake for the smaller wheels.

Having now particularly described our invention, what we claim, anddesire to secure by Letters Patent, is- V In combination with a truckfor tram-cars and like vehicles a brake comprising brakelevers O, pivotsZ suspending said lovers 0 from the truck, brake-blocks M carried onsaid levers O, hangers Y connecting said blocks M to pivots Z,connecting-rods P at either side of the truck connecting the levers 0,nuts 13,19 adjusting the position of the levers O and the brake-blocks Mrelatively to rods P, helical springs interposed between the nuts 19 andthe lovers 0 at one end of the rods P, application-levers R, pivoted tothe truck, adj usting-nutso on the rods P engaging the ends of levers Rand movable on the rods P, as and for the purpose set forth.

In witness whereof we have hereunto set our hands in presence of twowitnesses.

ANDREW S. NELSON. ALBERT STEWART. V THOMAS JOHNSON FOSTER.

Witnesses:

ARTHUR BURNS, MARY CLARKE.

be turnedto more or less

